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Zinus

Zinus 12 Inch Green Tea Cooling Memory Foam Mattress [New Version], King, Fiberglass Free, Medium Firmness, Cooling Gel Foam, Certified Safe Foams & Fabric, Mattress in A Box

  • Based on 2,526 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Jul 29 – Jul 30
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Size: King


Style: 12in Small box


Features

  • COOLER SLEEP AND A CLEANER PLANET Topped with soothing gel memory foam, this mattress is designed to help keep you cool and comfortable throughout the night, and ships in a new smaller box to support a reduced carbon footprint
  • REJUVENATING SUPPORT Pressure-relieving memory foam conforms to the shape of your body to enhance circulation and decrease stress on your joints, and is infused with cooling gel for ultimate temperature regulation
  • ALL NIGHT FRESHNESS - The all-natural green tea and purified charcoal infusions work together to help keep your mattress fresh for many nights to come
  • CERTIFIED SAFE MATERIALS Crafted from high-quality CertiPUR-US certified foam and wrapped with an OEKO-TEX certified mattress cover all produced without the use of harmful chemicals for safer, healthier sleep
  • WORRY-FREE WARRANTY A 10-year limited warranty is included with the mattress; please allow 2472 hours for your mattress to expand to its original shape

Description

Freshness meets cooling comfort The Zinus Green Tea Cooling Gel Memory Foam Mattress combines the long-lasting freshness of green tea extract and purified charcoal with cooling comfort and pressure-relieving support. Designed to create a sleep space that feels clean, inviting, and comfortable night after night, it delivers the benefits sleepers love most in one thoughtfully crafted mattress. Wake up to a fresher sleep environment Infused with green tea extract and purified charcoal, this mattress is designed to maintain long- lasting freshness over time. It's a simple addition that keeps your bed feeling clean, comfortable, and ready for rest whenever you are. Sleep comfortably throughout the night Cooling Gel Memory Foam draws heat away from your body to promote a more comfortable sleep experience. Paired with a breathable knitted cover, it creates a cooler sleep surface so you can rest more comfortably from bedtime to morning. Enjoy personalized comfort and pressure relief Memory foam gently contours to your shape, cushioning pressure points at the shoulders, hips, and joints while supporting proper alignment. The result is adaptive comfort that reduces tossing and turning for more restful sleep. The comfort most sleepers love The medium feel delivers a balance of cushioning and support that works well for side, back, stomach, and combination sleepers. Not too firm and not too soft, it keeps your body comfortably supported throughout the night. Sleep with greater peace of mind Made without fiberglass and crafted using certified safe materials, this mattress features CertiPUR-US certified foam and an OEKO-TEX Standard 100 certified cover tested for harmful substances. Easy to set up. Built to last. Delivered in one convenient box, this mattress is easy to move, unbox, and set up. Compatible with most bed frames and backed by a 10-year limited warranty, it's designed to provide lasting comfort and support. A cooler, fresher way to sleep.

Brand: Zinus


Size: King


Product Dimensions: 80"L x 76"W x 12"Th


Item Weight: 78 Pounds


Item Firmness Description: Medium


Top Style: Tight Top


Cover Material: Polyester


Number of Layers: 3


Fill Material: Gel Memory Foam


Weight Limit: 500 Pounds


Item Firmness Description: Medium


Number of Layers: 3


Weight Capacity Maximum: 500 Pounds


Additional Features: Breathable, Pressure Relief


Construction Type: Memory Foam with Gel


Is Customizable?: No


Portable: No


Is Foldable: No


Size: King


Item Dimensions L x W x Thickness: 80"L x 76"W x 12"Th


Item Weight: 78 Pounds


Item Thickness: 12 Inches


Item Dimensions: 80 x 76 x 12 inches


Item Depth: 12 inches


Cover Material: Polyester


Fill Material: Gel Memory Foam


Product Care Instructions: Spot Clean Only


Mattress Comfort Layer Material: Gel Memory Foam


Material Type: Gel Foam, High-Density Foam, Memory Foam, Polyester


Brand Name: Zinus


Product Benefits: Provides cooling, pressure-relieving sleep on CertiPUR-US certified foam for a healthier rest


Model Number: ZU-MFGN1YZI-12K


UPC: 841550362725


Mattress Type: Standard Mattress


Global Trade Identification Number: 25


Manufacturer: Zinus


Set Name: Green Tea Cooling


Manufacturer Part Number: ZU-MFGN1YZI-12K


Unit Count: 1.0 Count


Included Components: Mattress


Age Range Description: Adult


Item Type Name: Bed Mattress Conventional


top-style: Tight Top


Color: White


Shape: Rectangular


Style Name: 12in Small box


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jul 29 – Jul 30

Yes, absolutely! You may return this product for a full refund within 90 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Premium Cooling and Safety, but Brace for a Very Firm Sleep
Size: King Style: 12in Small box
The Zinus 12-Inch Green Tea Cooling Memory Foam Mattress (New Version) is an outstanding choice for eco-conscious sleepers who prioritize cooling technology and safety. While marketed as "Medium Firmness," user feedback consistently highlights that this "New Version" leans significantly toward the very firm side of the spectrum. Key Features and Performance Cooling Gel Integration: The top layer features cooling gel-infused memory foam, which is "super effective" at regulating body temperature and preventing the "sleeping hot" issue common with traditional memory foam. Fiberglass-Free Construction: A major highlight of the "New Version" is the fiberglass-free inner cover. It uses a safer fire retardant, providing peace of mind for those worried about skin irritation or indoor air quality. Certified Safe: The foams are CertiPUR-US certified, ensuring they are made without harmful chemicals, and the fabric is OEKO-TEX certified to be free from harmful substances. Mattress in a Box: The convenience of shipping is high; it arrives compressed and expands quickly, though it is recommended to let it air out for 48–72 hours for full expansion and scent dissipation. The "Firmness" Factor Despite the "Medium Firm" label, this mattress provides high-level support that may feel rigid to side sleepers or those who prefer a "sinking" cloud-like feel. Best for: Back and stomach sleepers who need spinal alignment and a solid surface. The Challenge: If you are a side sleeper, you may find the lack of "give" around your shoulders and hips uncomfortable without an additional topper. Final Verdict If you are looking for a durable, safe, and cool mattress that offers heavy-duty support, this Zinus model is a top-tier budget pick. However, be prepared—this is a very firm mattress that prioritizes support over plushness. ... show more
Reviewed in the United States on December 29, 2025 by tmoneysupaflyty
    • Expanded Perfectly - Reviewed 6 Months Later
Size: Queen Style: 12in Small box
I have had the same mattress for the past 5 years, and it came to me already five years old. I admit, as a night owl I didn't consider that I might have a more challenging time going to sleep at night because my bed was uncomfortable. I got a mattress topper for Christmas, and it helped a bit, but I didn't notice a huge difference. When my friend mentioned she'd bought a new mattress under similar circumstances, I began searching for a new one immediately. As a student, I obviously cannot really afford to drop $1000 on those fancy mattresses people kept recommending. The Zinus mattress caught my eye because A) it was recommended on just about every site I looked for "High-quality, affordable mattresses," and B) I have a 2-year-old Zinus bedframe that I love and has served me so well. I've had the mattress for a few days now and although it arrived a bit too firm for my liking, it has since softened. Granted, I spent some time walking on it to break it down faster. I expect the mattress to become even softer as it continues to modify to my body shape. Mattress preferences are extremely subjective, but for a 120-pound female, this mattress feels heavenly to me. I've been so excited about how it feels that I'm spending a lot of time in my bed and trying to go to bed earlier. I'm biased toward the brand but I will modify this review if I notice the quality of the mattress degrading. It’s been six months since I purchased this mattress and it has been such a game changer. It’s so comfy that it’s sent me down a rabbit hole of getting new, equally as comfy bedding to accommodate it. My bed is my favorite place in the world right now. I think for me this seemed like one of those too good to be true things because a mattress in a box is a weird concept for sure, but I’ve not had a single issue with it in the time I’ve had it. To anybody on the fence, there’s so many mattresses out there that purport to be one thing or another or the best in the business and the truth is it’s so subjective. But I don’t think the expense of a product has to equate to its quality. The $1000 mattresses aren’t necessarily better sometimes. This mattress was affordable and has proven itself. I’m very happy with the purchase ... show more
Reviewed in the United States on March 26, 2024 by Shelby
    • Inconsistent firmness, but when firm they are great
Size: King Style: 12in Small box
Review Image by Ginger Mammoth
I’ve ordered this bed probably 6 times now. 3 times I’ve had issues with the order. Summary: if you happen to get one of the firm ones they are amazingly comfortable and a good price. As well as long lasting as my 2016 one is still good as new comfort wise. That being said there seems to be some decent quality variability issues where you might get a bed that might as well be a soft couch cushion. Worth the price when you get one of their firm ones. Not sure how to avoid this without returning and rebuying until you luck into the good ones. Quality/Order timeline: 2016: Ordered Queen 12 inch bed for myself and it said delivered but was not there. Reordered after refund and it was an amazing bed. Very firm and comfortable. And even today it holds up as my guest bedroom mattress. I’ve had multiple people comment on how good it is and my mom even got one after this after she loved it (from me). 2020: Bought 2 more 12 inch queens for my family’s house and they were great. 2021: Bought 1 for my brother who lived with me for some time and when it was delivered it was really soft. Like the softest bed your can find and the edge support was terrible. I have no idea how the original firmness could change so much but I thought it was a fluke so I returned and reordered through amazon. The replacement was firmer but still not as firm as original. We decided to keep it as he was not picky. 2023: I order my mom a king 12 inch for her birthday. It arrived great and was super firm like the original. She loves it. 2024: With my mom’s success I decide to upgrade my bedframe and get a king myself. The mattress they send me is embarrassingly soft. If I sit on the edge I sink all the way down to my bedframe laying in the center is still not comfortable but not as bad as the edge. I decide to return it to Amazon to rebuy it as I assume it’s a quality issue. They send me another and it’s the exact same thing, really soft. Sincd then I’ve had trouble sleeping, neck pains, and because the top edge sags it makes it harder to sleep right with reflux since my head is often tilted down a bit. The edge support is absolutely terrible on the new 12 inch king I got and the center is still not as firm as the original one I bought or my moms recently. I decided to return it this week. I know zinus/amazon will take my king back again and let me rebuy but it’s a pain each time to unbox, try out, and return. Not to mention they almost certainly throw away the ones I send back. So unless zinus can guarantee the firmness of another order, for the sake of avoiding waste and effort I won’t buy this mattress again. It’s a shame as the original one was my absolute favorite mattress. ... show more
Reviewed in the United States on November 2, 2024 by Ginger Mammoth
    • Definitely worth the purchase
Size: Queen Style: 12in Small box
Purchased this mattress for 2nd home guest room. We did sleep on it for a week until our other ones arrived. This mattress is a little on the harder side but I think it will soften up over time. Even with the firmness being a little harder then I like it was still a very good night sleep. I also gave it 5 stars because we had been cleaning, remodeling, painting and all that good stuff so I was pretty sore from the day but I still woke up refreshed and ready to go for round 2. I believe this was due to the mattress which is a huge plus in my book. It arrived in a small box but inflated immediately to the noted 12 inch thickness. Great night sleep so lots of support. I also normally run hot when I sleep and had no issues in the hot Florida week I slept on it. ... show more
Reviewed in the United States on July 6, 2026 by mzulch
    • It's a solid bed for the price. NO FIBERGLASS on mine
Size: Queen Style: 12in Small box
It's a good, cheap mattress. I didn't really expect to like this mattress as much as I did. The old model had fiberglass but I can confirm that the new one doesn't. Check the tag on the bottom if you're worried. You'll get a card that has the manufacture date too, if it's 2022 or later you should be good. I'd personally call this bed firm, perhaps leaning on extra firm. It softens as you lay on it as all memory foam does, but I wasn't expecting it to be so hard. I'd also call it pretty warm, but it's not insufferable for me at least. Maybe try the Gel Cooling variant if you run hot in bed? I think it's very comfortable, provides great support (like all memory foam does), and it arriving in a box made it easy to lug around before I was ready for it. The corners didn't fully expand for me and are around 8'' (rather than 12'') but I don't mind. I think they fudge the numbers a bit, since at the center the bed seems to be 10-11'' but maybe they measure it differently than what I'm doing. regardless I don't think it really affects the quality of the bed (especially since most beds are like 6-8'' anyway). ... show more
Reviewed in the United States on July 10, 2026 by a customer
    • Good edge support, minimal motion transfer!
Size: Queen Style: 12in Small box
I’m very happy with this mattress so far. It took a little while for the corners to fully expand, but by the 72-hour mark they were completely filled out, just as expected. I only let it expand for about 12 hours before sleeping on it because I needed to use it that same night. Even though it wasn't fully expanded yet, I still found it comfortable and slept well. This mattress is definitely on the firmer side, which is exactly what I was looking for. It has great edge support, and one of my favorite things is that I barely feel my husband moving during the night. Motion transfer is minimal, which makes a big difference for light sleepers. I'm also uploading a video to show how stable it is. You can place a cup filled with liquid on the mattress, move around on the bed, and it barely moves or spills! Overall, I'm very pleased with the quality and comfort. ... show more
Reviewed in the United States on July 16, 2026 by Andrea Moyano
    • Too firm - Not like the previous version of Zinus Green Tea Memory Foam
Size: King Style: 12in Small box
This mattress is very firm - much firmer than the previous Zinus memory foam version. I do not find it comfortable. For reference, we had the previous version of the Zinus green tea mattress for about 5 years and LOVE it, very comfortable and the perfect balance of soft and supportive. We only replaced our previous Zinus because we upgraded from a Queen to a King. This new version of Zinus is much firmer. I don't find it to be very comfortable. Even with a down topper added, it is much too firm for me. I am a side sleeper, so I do like a softer mattress. My husband is a back sleeper who likes a firmer mattress, and even he finds this mattress too firm. We've had it for about 5 months and have decided to get rid of it. We're sad to have wasted the money, but good sleep is too important. ... show more
Reviewed in the United States on April 26, 2026 by Kevin Lubega
    • Making Mattress Stores Sad & Obsolete Everywhere.
Size: Queen Style: 12in Small box
Bought this for the guest room, but after trying it myself for one night, I think this will replace our other conventional mattresses in the future. First impression: surprisingly firm, yet delightfully comfy as the foam slowly adapts to your body. Next morning: you are in memory foam heaven, all your muscles are relaxed & smiling, and you do not want to get out of bed. Ever again. My guests may never leave. I might even pick a fight with my sweet boyfriend, just to get to sleep in the guest room again. The cooling gel adds firmness to what is already a well designed support system, and the memory foam gives such an indulgent, luxurious comfort, you’ll wonder if you’ve sleepwalked to a fancy hotel. In fact, I wouldn’t be surprised if every hotel chain started buying these. With a mattress this good, for a price this low, there is no excuse for any uncomfortable mattresses to exist anymore. I’ve only had mine for a month, but I’ve heard great things about durability from friends and other users, and with a 10 year warranty, this is a pretty low risk investment. Setup is a 2 person job, unless you just really like a comedic challenge. It is fun to open the box, roll it out on the bed, and watch it poof up. All poofed up, it looks exactly like any other mattress, and the size and fit dimensions are as expected. Give it a few days to fully “off-gas” before using it. It does firm up in the first few days. And please, if you can, try to recycle your old mattress responsibly- there are many orgs doing great things to keep them out of landfills, for the same price that that sad old mattress store was going to charge you to take your old mattress away to a landfill, after they sold you an overpriced, less comfortable mattress. You will never go back into a mattress store once you’ve tried this new mattress. ... show more
Reviewed in the United States on July 13, 2024 by Bird Lady

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